Asteroids and. comets.
{"Image DocumentName": "Asteroidsand. comets.", "Image ImageDescription": "Though too small to earn the distinction of planet, asteroids and comets strike huge fear in the human mind. And for good reason: at some point in the future, one of the chunky rocks or icy mud balls will slam into Earth and alter the course of history. Such an impact 65 million years ago is widely believed to have killed off the dinosaurs.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}